I'm currently in the process of implementing Content-Security-Policies. But my apache refused to accept the config settings.
The apache2 versions I am currently using are: 2.2.22 and 2.4.7. Neither ...

I have a server with postfix MTA installed that accepts mail for my domain, hereinafter @example.com. I need to setup forwarding for certain emails@example.com to other emails . e.g. @gmail.com and ...

Note: This is NOT a duplicate question, there are no questions that address the very specific details of headers as far as whether the inclusion of multiple DKIM entries will result in landing in the ...

I would like to modify received_header_text to add additional "Received: ..." header for authenticated mails - so gmail import will check SPF against our server, not client IP.
But my exim.conf does ...

I have trouble trying to make Nginx ignore and hide some headers from a proxied server.
I want Nginx to hide and ignore "Cache Control" and "Server" headers but it didn't work, I don't know why.
My ...

Please bear with me as I'm not an expert admin
I have a linux mail server that has been running for a couple of years and now all of a sudden a certain user is unable to send emails. They immediately ...

I'm a little paranoid that my new mail server might not be configured right, and I'm wondering if I made a mistake somewhere. Or maybe it's just the way Yahoo does things with their mail service.
To ...

In theory browsers do not pass on referer information from HTTPS to HTTP sites. And in my experience this has always been true. But I just found an exception, and I want to understand why it works so ...

I have tried and tried to google my way out of this. This definitely has to be a very common problem because I am half-way intermediate at Linux and etI am complaining about default settings and how ...

I am sending small amounts of data (up to 100 bytes) every 10 minutes from devices to TCP server. In my case overhead seems to be huge (we pay for each byte). I found that I have at least 7-10 packets ...

I've looked at a few sources on how to go about cross-compiling, and from what I understand, I need the header files for the system I am compiling for.
Some background info: The school I am a student ...

I am doing a setup where Apache runs the web application and NginX serves files that users download. The files should be downloaded with their real names instead of the names their are being stored ...

I have set up a header filter in postfix to discard messages from Russia and Romania because of the volume of spam coming from those and we do not currently do business in those countries.
My regex ...

I'm using an IIS website with a Apache HTTP reverse proxy (mod_proxy with ProxyRequests Off).
I want to control the expires headers in apache (don't ask), but IIS is setting the header Expires: -1.
...

In some SMTP server implementations (i.e. Postfix) you can enable Delivered-To and X-Original-To headers that will be added to your email. (or [X-]Envelope-To)
This is very helpful with distribution ...

X-LBSMTP-Spam-Policy: SendBlaster SMTP is a paid relay service.We do not tolerate UCE of any kind. Please report it ASAP to abuse@lbsmtp.org.
I want to add such a header to mails sent by my postfix ...

I was working on my node server and encountered the need to implement the use of request.headers.referer. When I did tests and read headers to determine how to write the parsing functions, I couldn't ...

I am using windows server 2008 r2 and IIS 7.5 normally. I am using IIS 6 smpt server to send emails. Right now when i send email via my C# application i am seeing 2 received from headers. What might ...